On 11th February I managed to speak to Vodafone. I had over 20 years with Telecom and last February joined Vodafone on a 12 month contract.
I have no technical issues with Vodafone, but knew that after 12 months my monthly bill would increase by $10 per month. It was clearly stated that this would happen.
So I was paying $103 per month (after they added the $4.00 increase to cover their costs) for a 150gb VDSL plan plus home line per month. This plan no longer exists.

So I thought, I may as well sign up for the Unlimited VDSL plan plus phone for $109.00 per month.
I finally managed to speak to a Vodafone rep. I quizzed him and was assured that I would be only paying $109 per month. This was obviously better than paying $103 + $10 = $113 per month for a 150gb cap.

No sooner had the sales rep. changed my plan to Unlimited, I got an email saying my monthly bill would be $115.00.

I immediately logged an incident with Vodafone (rather than wait on the phone again) asking why I was assured my bill would be $109 per month and was now $115 per month. I have an incident number.

After initially logging my issue on Feb 11 (Wednesday) I have heard nothing from Vodafone.

I work one way or another in Customer Services and there is now way that I could not reply within 3 days to a Service Request.